text: /**
   * Copyright © Magento, Inc. All rights reserved.
   * See COPYING.txt for license details.
   */
  
  define([
      'jquery',
      'mage/backend/validation'
  ], function (jQuery) {
      'use strict';
  
      return function (config) {
          var _config = jQuery.extend({
              element: null,
              message: '',
              uniqueClass: 'required-unique'
          }, config);
  
          if (typeof _config.element === 'string') {
              jQuery.validator.addMethod(
                  _config.element,
  
                  function (value, element) {
                      var inputs = jQuery(element)
                              .closest('table')
                              .find('.' + _config.uniqueClass + ':visible'),
                          valuesHash = {},
                          isValid = true;
  
                      inputs.each(function (el) {
                          var inputValue = inputs[el].value;
  
                          if (typeof valuesHash[inputValue] !== 'undefined') {
                              isValid = false;
                          }
                          valuesHash[inputValue] = el;
                      });
  
                      return isValid;
                  },
  
                  _config.message
              );
          }
      };
  });
  